Lip shield



FIG. 1 is a perspective view of an ornamental design for a lip shield in accordance with this invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines indicate the environment associated with the lip shield design and forms no part thereof. 

CLAIM The ornamental design for a lip shield, as shown and described. 